"Formosa" was occupied by Dr. F. O. Stedman during 1915 who had assisted Dr. James Cantlie, a prominent local doctor, philanthropist and specialist in tropical diseases, to found the Peak Hospital in 1890.
After Dr. Cantlie's departure from the colony in 1896, Dr. Stedman and two partners Drs. Hartigan and Rennie continued to administer the hospital as a private hospital.
In 1906 a company was formed to continue it with the original three partners and four other doctors as shareholders.
In 1922 the company was disolved and the hospital was (leased to goverment) continued under the ownership of a Mr. J. E. Joseph.
Between 1932 and 1933 the hospital was closed and converted into flats called "Victoria Ridge".
I am assuming that the buildings were destroyed in the war.